A low voltage condition may set this DTC. Reviewing the Freeze Frame/Failure Records may be beneficial in diagnosing this concern.

This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test .

A powertrain relay that is slow to switch on may set this DTC. Inspect the relay thoroughly

A low voltage condition may set this DTC Inspect for proper battery voltage and correct charging system operation.

The throttle valve is spring loaded to a slightly open position. This is referred to as the rest position.

The throttle valve should not be completely closed nor should they be open any more than the specified amount.

The throttle valve should move open and to the closed position without binding under the normal spring pressure.

The throttle should NOT be free to move open or closed WITHOUT spring pressure.

Replace the throttle body if any of these conditions are found.

The scan tool has the ability to operate the throttle control system using Special Functions. Actuate the throttle valve using the throttle blade control function located in the Throttle Actuator Control (TAC) System menu. This function will operate the throttle valve through the entire range in order to determine if the throttle body and system operate correctly.

Inspect for the following conditions:

Use the J 35616 Connector Test Adapter Kit for any test that requires probing the ECM harness connector or a component harness connector.

Poor connections at the ECM or at the component--Inspect the harness connectors for a poor terminal to wire connection. Refer to Testing for Intermittent Conditions and Poor Connections for the proper procedure.

For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .

Trouble Code: P2101

Throttle Actuator Position Performance

Trouble Code: P2101

Control Module Throttle Actuator Position Performance

Possible Causes:

Throttle blade that is not in the rest position

Throttle valve that is binding open or closed

Throttle valve that opens or closes without spring pressure

Throttle body malfuntion

ECM has failed

Trouble Code: P2101

Throttle Closed Position Performance

Possible Causes:

Throttle blade that is not in the rest position

Throttle valve that is binding open or closed

Throttle valve that opens or closes without spring pressure

Throttle body malfuntion

ECM has failed

Trouble Code: P2108

Throttle Actuator Control (TAC) Module Performance

Possible Causes:

Throttle blade that is not in the rest position

Throttle valve that is binding open or closed

Throttle valve that opens or closes without spring pressure

Throttle body malfuntion

ECM has failed

Trouble Code: P2119

Throttle Closed Position Performance

Possible Causes:

Inspect for mechanical conditions or binding that may be temperature related. Components may not move freely in extreme heat or cold due to the presence of contaminants or ice formation.

Trouble Code: P2119

Throttle Closed Position Performance

Trouble Code: P2119

Throttle Closed Position Performance

Possible Causes:

Throttle blade that is not in the rest position

Throttle valve that is binding open or closed

Throttle valve that opens or closes without spring pressure

Throttle body malfuntion

ECM has failed

Trouble Code: P2120

Accelerator Pedal Position (APP) Sensor 1 Circuit

Trouble Code: P2120

Accelerator Pedal Position Sensor 1 Signal Performance

Possible Causes:

APP sensor connector is damaged, open or shorted

APP1 sensor signal circuit is open or shorted to ground

APP1 sensor signal circuit is shorted to APP sensor 2 circuit

APP1 sensor signal circuit is open or shorted to VREF (5v)

APP sensor is damaged or it has failed

TAC module is damaged or it has failed

Trouble Code: P2122

Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

Trouble Code: P2122

Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

Possible Causes:

Low reference circuit of the APP sensor for a short to voltage, or an open/high resistance.

5-volt reference circuit for a short to ground or open/high resistance.

Faulty APP Sensor

ECM has failed

Trouble Code: P2123

Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

Trouble Code: P2123

Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

Possible Causes:

Low reference circuit of the APP sensor for a short to voltage, or an open/high resistance.

5-volt reference circuit for a short to ground or open/high resistance.

Faulty APP Sensor

ECM has failed

Trouble Code: P2125

Accelerator Pedal Position (APP) Sensor 2 Circuit

Trouble Code: P2125

Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

Possible Causes:

Low reference circuit of the APP sensor for a short to voltage, or an open/high resistance.

5-volt reference circuit for a short to ground or open/high resistance.

Faulty APP Sensor

ECM has failed

Trouble Code: P2127

Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

Trouble Code: P2127

Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

Possible Causes:

Low reference circuit of the APP sensor for a short to voltage, or an open/high resistance.

5-volt reference circuit for a short to ground or open/high resistance.

Faulty APP Sensor

ECM has failed

Trouble Code: P2128

Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

Trouble Code: P2128

Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

Possible Causes:

Low reference circuit of the APP sensor for a short to voltage, or an open/high resistance.

5-volt reference circuit for a short to ground or open/high resistance.

Faulty APP Sensor

ECM has failed

Trouble Code: P2129

Barometric Pressure (BARO) Sensor Circuit High Voltage

Possible Causes:

Moisture in the vent inlet

Debris in the vent inlet

Trouble Code: P2135

Throttle Position (TP) Sensor 1-2 Correlation

Possible Causes:

If the DTC is determined to be intermittent, refer to Testing for Intermittent Conditions and Poor Connections .

Trouble Code: P2135

Throttle Position (TP) Sensor 1-2 Correlation

Trouble Code: P2135

Throttle Position Sensor 1-2 Correlation Error

Possible Causes:

TP1 sensor signal circuit shorted to TP sensor signal 2 circuit

TP1 sensor signal circuit is shorted to the low reference circuit

TP2 sensor signal circuit is shorted to the low reference circuit

Throttle body assembly is damaged or it has failed

Trouble Code: P2138

Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Possible Causes:

The ECM compares the signal of each of the APP sensor to each other throughout the entire range of operation. Clear the DTCs and actuate the pedal through the entire range with the ignition ON and the engine OFF.

Use the J 35616 Connector Test Adapter Kit for any test that requires probing the ECM harness connector or a component harness connector. Using this kit will prevent damage to the harness connector terminals.

For intermittent conditions, refer to Testing for Intermittent Conditions and Poor Connections .

Trouble Code: P2138

Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Trouble Code: P2138

Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Possible Causes:

Low reference circuit of the APP sensor for a short to voltage, or an open/high resistance.

5-volt reference circuit for a short to ground or open/high resistance.

Faulty APP Sensor

ECM has failed

Trouble Code: P2176

Minimum Throttle Position Not Learned

Possible Causes:

The throttle valve is spring loaded to a slightly open position. This is referred to as the rest position.

The throttle valve should not be completely closed nor should they be open any more than the specified amount.

The throttle valve should move open and to the closed position without binding under the normal spring pressure.

The throttle should NOT be free to move open or closed WITHOUT spring pressure.

Replace the throttle body if any of these conditions are found.

The scan tool has the ability to operate the throttle control system using Special Functions. Actuate the throttle valve using the throttle blade control function located in the TAC System menu. This function will operate the throttle valve through the entire range in order to determine if the throttle body and system operate correctly.

Inspect for the following conditions:

Use the J 35616 Connector Test Adapter Kit for any test that requires probing the ECM harness connector or a component harness connector.

Poor connections at the ECM or at the component--Inspect the harness connectors for a poor terminal to wire connection. Refer to Testing for Intermittent Conditions and Poor Connections for the proper procedure.

For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .

Trouble Code: P2176

Minimum throttle Position Not Learned

Trouble Code: P2176

Minimum Throttle Position Not Learned

Possible Causes:

Perform the throttle learn procedure

Throttle body has failed.

Trouble Code: P2270

HO2S Signal Stuck Lean Sensor 2

Possible Causes:

HO2S signal circuit open/high resistance

HO2S signal circuit short to voltage

HO2S signal circuit open/high resistance

HO2S is damaged

ECM has failed

Trouble Code: P2271

HO2S Signal Stuck Rich Sensor 2

Possible Causes:

HO2S signal circuit open/high resistance

HO2S signal circuit short to voltage

HO2S signal circuit open/high resistance

HO2S is damaged

ECM has failed

Trouble Code: P2301

Ignition Coil 1 Control Circuit High Voltage

Possible Causes:

Ignition Coil circuit for a short to ground or an open/high resistance

Inition Coil circuit for a short to voltage

Ignition coil has failed

ECM has failed

Trouble Code: P2303

Ignition Coil 2 Control Circuit Low Voltage

Possible Causes:

Ignition Coil circuit for a short to ground or an open/high resistance